As nouns the difference between lightweight and hydroforming

is that lightweight is (boxing) a boxer in a weight division having a maximum limit of 135 pounds for professionals and 132 pounds for amateurs while hydroforming is (engineering) a cost-effective way of shaping malleable metals into lightweight, stiff pieces by means of high-pressure hydraulic fluid.

As an adjective lightweight

is lacking in earnestness, ability, or profundity.

As nouns the difference between stiff and hydroforming

is that stiff is an average person, usually male, of no particular distinction, skill, or education, often a working stiff or lucky stiff while hydroforming is a cost-effective way of shaping malleable metals into lightweight, stiff pieces by means of high-pressure hydraulic fluid.

As an adjective stiff

is of an object, rigid, hard to bend, inflexible.

As a verb stiff

is to fail to pay that which one owes (implicitly or explicitly) to another, especially by departing hastily.

As nouns the difference between foreigner and expulsionism

is that foreigner is a person from a foreign country while expulsionism is the belief that foreigners should be expelled.

As a verb expel

is to eject or erupt.

As a noun expulsionism is

the belief that foreigners should be expelled.

As nouns the difference between elite and eliteness

is that elite is elite while eliteness is the quality of being elite.

As an adjective fictive

is fictional, unreal, fanciful or invented.

As a noun fictiveness is

the quality of being fictive.

As adjectives the difference between servile and genuflective

is that servile is of or pertaining to a slave while genuflective is servile.

As a noun servile

is (grammar) an element which forms no part of the original root.

As nouns the difference between softball and mushball

is that softball is a game similar to baseball but played with a larger and softer ball which can be thrown overhand or underhand while mushball is a variant of softball with a bigger, softer ball and no gloves or mitts worn by the fielders.

As nouns the difference between ball and mushball

is that ball is while mushball is (sports) a variant of softball with a bigger, softer ball and no gloves or mitts worn by the fielders.

As nouns the difference between glove and mushball

is that glove is an item of clothing other than a mitten, covering all or part of the hand and fingers, but allowing independent movement of the fingers while mushball is (sports) a variant of softball with a bigger, softer ball and no gloves or mitts worn by the fielders.

As a verb glove

is (baseball|transitive) to catch the ball in a baseball mitt.